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2019-2020 Azerbaijan Finals, June 17


Ziya suspects that he has become infected with a coronavirus. In this regard, he conducts research on his DNA, and, as a result of calculations, finds out that three different numbers a, b and c are associated with his DNA. Ziya believes that if substituting in expression a <> b <> c instead of (<>) + or -, you can get number 2020, then he did not become infected with coronavirus, otherwise, if this is not possible, he becomes infected. Help Ziya find out if he got infected with coronavirus.


One line contains integers a, b and c (1a, b, c108).


If Ziya is not infected, print the expression a <> b <> c which yields 2020. Otherwise print the word CORONA. When outputting an expression, there should not be spaces between numbers and operators.

Time limit 1 second
Memory limit 128 MiB
Input example #1
2019 2020 2021
Output example #1
Input example #2
2019 2020 2022
Output example #2
Author Rafael Sadatimov
Source 2019-2020 Azerbaijan Finals, June 17